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iOS Build a Simple iPhone App with Swift 2.0 Improving Our User Interface Changing the Background Color

Prapassorn Tinnabavorn
Prapassorn Tinnabavorn
3,528 Points
Posted by Prapassorn Tinnabavorn
Prapassorn Tinnabavorn
3,528 Points

Should it be *blue: 1.0* or *blue: 255/255* instead of *blue: 255* ?

I thought the values couldn't go above 1.0 for UIColor :)

1 Answer

Jari Koopman
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Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points
Jari Koopman
.a{fill-rule:evenodd;}techdegree seal-36
Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points

Hi Prapassorn,

That's true unless you are a bit cheaty (like me) and create something like this: 

extension UIColor {
    static func rgbColor(redValue: CGFloat, greenValue: CGFloat, blueValue: CGFloat, alpha: CGFloat) -> UIColor {
        return UIColor(red: redValue/255.0, green: greenValue/255.0, blue: blueValue/255.0, alpha: alpha)
    }
}

Which you can call as follows:

UIColor.rgbColor(redValue:255, greenValue:255, blueValue:255, alpha:1.0)

But that's not needed.

Hope this helped!

Regards, Jari